x/3=(x-120)/60 * 30 怎么解
问题描述:
x/3=(x-120)/60 * 30 怎么解
答
x/3=(x-120)/60 * 30
两边同时乘以6,即得2x=3*(x-120)
即3x-2x=3*120
x=360
答
x/3=(x-120)/60 * 30
x/3=(x-120)*1/60*30
x/3=(x/60-2)*30
x/3=x/2-60
x/3-x/2=-60
-x/6=-60
x=60*6
x=360